Vintage Patty Shelabarger Silk Princess Dress Amorosa Vintage PRINCESS DIANA's NIECE and Prince William & Prince Harry's cousin, Lady Kitty Spencer A legacy of beauty, aristocracy and haute couture. From the Spencer family to modern royal glamour, Lady Kitty Vintage Princess Dress Fairytale Princess Diana's Twin Nieces Wore Matching Versions of Her Famous 'Revenge Dress' Glamour Princess Diana's nieces Amelia and Eliza Spencer attended the Fashion Awards wearing matching black dresses which drew comparisons to their late aunt's infamous "revenge dress" see their stunning red carpet looks